Conduit fitting



Feb. 25, 1930. R. P. DUNMIRE 1,748,544

COXIWDUIT FITTING Filed Oct. 30, 1925 I2 fyvzzvrok. I

. ATTORNEYS" Patented-.Feb. i 25, 1930 UNITED STATES PATENT OFFICE RUSSELL P. DUNMIRE, OF ERIE, PENNSYLVANIA, ASSIGNOR TO ERIE MALLEA IBLE IRON COMPANY, OF ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA CONDUI'I. FITTING This invention is designed to improve co for securing the conduit to the fitting. Features and details of the invention will appe from the specification and claim.

Application filed October 30, 1925. Serial No. 65,821.

nto engage an inserted conduit; and a cover (luit fittings for use with threadless conduits closing the transverse opening and locklng and is' directed to the improvement of means the pin 1n place.

In testimony whereof I have hereunto set ar my hand.

RUSSELL P. DUNMIRE.

The invention is illustrated in the accompanying drawings as follows Fig. 1 shows a plan view of the fitting on the line 11 in Fig. 2.

Fig. 2 a section on the line 22 in F g. 1.

Fig. 3 an enlarged view of one of the key pins.

1 marks the body of the fitting which exemplified is in the form of a conduit box.

opening 3.

Transverse openings 5 are arranged in the extension 2. These are off-set from the opening 3 but extend into it. Key pins 6 are plac in the openings 5. These are provided wi edges 8.

grooves 7 at their ends forming cutting ed th In order to look a conduit with the fitting the conduit is inserted in the opening 3 and the pins 6 driven into the opening, the cutting edge 8 cutting a groove in the wall of the conduit and forming a. key seat 9 for the pin. The pin and opening are preferably slightly tapered so that when the pin is in its final position it not only has cut the key seat in the wall of the conduit but the conduit is also clamped by the wedging action of the pin.

It will be noted that the cover closes the openings 5 and thus locks the lace.

What I claim as new is tapered keys In a conduit box, the combination of a body having a conduit opening and an extension with a transverse opening off-set from and extending into the conduit opening; a tapered locking pin in the transverse opening adapted 

